Then I do recommend removing the "if (cpu_has_sse4_1)" from this patch and similar places, because there is no runtime CPU dispatching happening for SSE optimized code paths in action and just adds extra overhead (unnecessary branches) to the generated code.

Same must be applied to these patches:
[Mesa-dev] [PATCH 2/2] i965: add runtime check for SSSE3 rgba8_copy
http://lists.freedesktop.org/archives/mesa-dev/2014-November/070256.html

Best regards,
Siavash Eliasi.
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